Anemia is one type of red blood cell disorder. A lack of the mineral iron in your blood usually causes this disorder. Your body needs iron to produce the protein hemoglobin, which helps your red blood cells carry oxygen from your lungs to the rest of your body.
Heat transfer refers to the physical process by which heat energy moves from one area to another. The Heat Transfer Methods figure above illustrates various heat transfer methods. Branches above the fire are receiving heat by convection and radiation.
Energy transfer is when energy passes from one place to another or one object to another. Energy transfer can take the form of transmitting energy through physical means, through heat, or through electromagnetic waves. Sometimes energy is changed from one form to another, like when wind turbines are used to turn mechanical energy, wind, into electrical energy.